Bonding durability of photocured phenyl-P in TEGDMA to smear layer-retained bovine dentin.
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| Abstract |
The long-term durability of a photocured resin bond to ground bovine dentin with its smear layer retained was investigated. The bonding resin that was employed was composed of 5.0 wt% 2-(methacryloxy)ethyl phenyl hydrogen phosphate (phenyl-P) as a diffusion-promoting monomer, 0.5 wt% camphorquinone as a photosensitizer, and 0.5 wt% N-phenylglycine as a reducing agent in triethyleneglycol dimethacrylate. Following polymerization of the bonding resin, a composite resin was placed and photocured for 60 seconds. Prepared specimens were stored in 37 degrees C water for 1 day, 6 months, and 1 year. Measured tensile bond strengths were 6.7 MPa after 1 day of storage, 4.1 MPa after 6 months of storage, and 2.8 mPa after 1 year of storage. Examinations of the interfaces after fracture under tensile loading suggested that long-term water-immersion weakened the bonds between the photocured adhesive resin and the smear layer-retained dentin because there was insufficient diffusion of the adhesive resin through the retained smear layer.
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| Authors | I Watanabe, N Nakabayashi |
| Journal | Quintessence international (Berlin, Germany : 1985) (Quintessence Int) Vol. 24 Issue 5 Pg. 335-42 (May 1993) ISSN: 0033-6572 [Print] Germany |
| PMID | 8362048 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
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